<template>
	<div id="a1">

		<div class="dv1">
           <a3></a3>
		</div>
	</div>
</template>
<!--局部组件-->
<script>
	export default {
		name:'a1'
	}
</script>

<style>
	.dv1{
	width: 500px;
	height: 500px;
	background-color: red;
	}
</style>